To warm your boots on cold days, you decide to sew a circuit with some resistors
ID: 1580597 • Letter: T
Question
To warm your boots on cold days, you decide to sew a circuit with some resistors into the insole of your boots. You want 10W of heat output from the resistors in each insole, and you want to run them from two 9-V batteries (connected in series). What total resistance should you put in each insole?
a total resistance that should you put in each insole 1/32
b total resistance that should you put in each insole 1.8
c total resistance that should you put in each insole 32
d total resistance that should you put in each insole 3240
Explanation / Answer
P = v^2/R
R = V^2 /P
R = 18 ^2 /10 = 32.4
c) total resistance that should you put in each insole 32 option C